​Compilation of California Regional* Geologic Mapping References
*(1:250,000 scale)

This compilation provides indices (lists) of selected geologic mapping references in California. In an effort to cover each 1:250,000-scale quadrangle with geologic mapping, the California Geological Survey (CGS) included references from graduate theses, unpublished maps, and Open-File Reports​ produced by the Division of Mines and Geology (i.e. CGS prior to A​ugust 2006). It is designed to be used in conjunction with the data source indices published with the CGS' 1:250,000 - scale regional geologic map series, the 1:250,000-scale map sheets of the Geologic Atlas of California, and other indices to geologic maps.

THIS COMPILATION DOES NOT PROVIDE A PATHWAY TO VIEWABLE MAPS; TO VIEW MAPS, PLEASE VISIT OUR MAPS & DATA PAGE​.

Geologic Map Index 250K  

Alturas | Bakersfield | Chico | Death Valley | Fresno | Kingman | Long Beach | Los Angeles | Mariposa | Monterey | Needles | Redding | Sacramento | Salton Sea | San Bernardino | San Diego-El Centro | San Francisco | San Jose | ​San Luis Obispo | Santa Ana | Santa Maria | Santa Rosa | Susanville | Trona | Ukiah | Walker Lake | Weed